William Byron’s 2025 NASCAR season has been a highlight reel from start to finish. At 27, the Hendrick Motorsports driver is heading into the Phoenix finale with 11 wins, a dominant triumph at the Xfinity 500 in Martinsville on October 26, and a third straight berth in the Championship 4. His focus is razor sharp, his momentum undeniable—and beside him in this high-pressure journey is the woman fans keep asking about: Hailey McGregor.
Their relationship isn’t splashy or overexposed. It’s quiet, steady, and exactly the kind of support system a title contender leans on when the stakes rise.
Who Is William Byron’s Girlfriend?
Hailey McGregor is William Byron’s confirmed girlfriend, though she keeps her world intentionally private. She doesn’t promote brand deals, run a public influencer page, or chase cameras around pit road. Fans recognize her from the stands—smiling, cheering, and staying comfortably out of the spotlight.
Little is publicly known about her background. What fans do see is her consistent presence throughout the 2025 season, appearing at key races without stepping into the social media frenzy that surrounds drivers’ partners. Her personality comes across as warm and understated, matching Byron’s own reserved nature. Their dynamic works because it isn’t performative; it’s grounded.
How Their Relationship Began
Byron and Hailey quietly began seeing each other in 2024, shortly after his long-term relationship with Erin Blaney ended. There was no dramatic reveal or red-carpet debut. Instead, fans simply started noticing a brunette woman accompanying Byron at select events later that year.
By September 2024, the whispers had turned into confirmation. Hailey was the woman by his side.
Through the 2025 season, she has gradually become a familiar figure at the track—always supportive, never intrusive. Her presence at Martinsville, where Byron led more than 300 laps in a statement victory, only strengthened fans’ impressions that she’s become a meaningful part of his life.
A Look Back at Byron’s Past With Erin Blaney
Before Hailey, Byron spent nearly five years in a relationship with Erin Blaney, sister of fellow NASCAR star Ryan Blaney. They were a beloved paddock couple, often appearing together at races and in family photos. Their split in early 2024 surprised fans, though it was described as amicable and rooted in the realities of their busy, separate lives.
After the breakup, Erin stepped back from the NASCAR spotlight. Rumors briefly linked her to other drivers, as often happens in tight-knit sports communities, but nothing concrete followed. Byron, meanwhile, quietly began a new chapter with Hailey—a shift fans gradually embraced.
Putting Sabrina Carpenter Rumors to Rest
In February 2025, a harmless prank spiraled into viral drama when a parody online comment suggested William Byron was dating pop star Sabrina Carpenter. The rumor gained steam after a blonde woman—who vaguely resembled Carpenter—was seen near Byron at Daytona.
Byron shut it down immediately, clarifying that the post was fake and the woman in question was simply an acquaintance. The moment turned into a humorous footnote in a season otherwise defined by intense racing and career-defining wins.
Hailey’s confirmed role later in the year officially ended the speculation.
Hailey’s Role in His 2025 Season
This season has been a test of mental endurance for Byron—intense points battles, high-pressure playoffs, and redemption after tough wrecks at Charlotte and Talladega. Through it all, Hailey has remained a quiet emotional anchor.
Unlike Byron’s previous relationship with Erin, Hailey’s world isn’t embedded in NASCAR culture. That outsider perspective seems to give Byron something he needed: separation between racing and personal life. Fans have noted how calm and centered Byron appears off-track this year, often crediting Hailey’s steady influence as part of that shift.
Her cheering during the Martinsville victory—where Byron fought back from a deep points deficit—symbolized her place in his life: present, supportive, and content with privacy.
Byron’s Life Beyond Racing
Though known for his discipline and laser focus on the track, Byron lives a balanced life away from it. Raised in Charlotte, he earned a degree from Liberty University and is close to his parents and sister. He enjoys gaming, home projects, and the quiet rhythms of family time—parts of his life Hailey now shares.
Questions about marriage, kids, or future family plans circulate among fans, but there are no signs Byron is rushing into anything. He’s not married, has no children, and—at this phase—seems fully committed to his racing career and growing relationship with Hailey.
How Fans View the Couple
NASCAR fans have warmed to Hailey quickly. Her low-key presence contrasts with the busy, public-facing world of the Cup Series, refreshing in a sport where personal lives sometimes become too exposed.
Her genuine enthusiasm at races and obvious pride in Byron’s success have made her quietly popular among the fanbase. Many see her as a stabilizing, grounded partner who complements Byron’s personality. Speculation about engagement or next steps pops up occasionally, but there’s no credible indication the couple is heading in that direction yet.
They appear comfortable letting the relationship grow naturally rather than publicly.
Finding Balance Amid Fame
Byron’s Martinsville domination—leading over 300 laps in a win-or-bust scenario—showed the poise of a driver at peak confidence. Off the track, his relationship with Hailey seems to mirror that steadiness. They’ve built something calm and sincere in the middle of constant travel, training, and media attention.
Hailey doesn’t need to be center stage, and Byron doesn’t push her into it. Instead, they choose privacy, shared routines, and a sense of normalcy—even when the NASCAR world is anything but normal.
Conclusion
William Byron’s romance with Hailey McGregor has emerged as a steady, supportive chapter in his life as he chases NASCAR glory. Their relationship began quietly, grew privately, and now accompanies one of the best seasons of his career.
From Martinsville celebrations to her quiet presence at playoff races, Hailey has become an important part of his world. While his past with Erin Blaney and fleeting rumors with celebrities once fueled speculation, it’s Hailey who stands beside him as he heads into the 2025 Championship 4.
Whether or not the couple takes a next step anytime soon, their story is unfolding naturally—and for fans who admire Byron’s mix of intensity and humility, that’s something worth cheering for alongside the trophies.